Chem. J. Chinese Universities ›› 2022, Vol. 43 ›› Issue (11): 20220482.doi: 10.7503/cjcu20220482

• Polymer Chemistry • Previous Articles     Next Articles

Monte Carlo Simulation on Self-healing Behaviour of Hydrogen-bonded Hydrogel

GAO Huiling1, CAO Zhenzhen1, GU Fang1(), WANG Haijun1,2,3()   

  1. 1.College of Chemistry and Environmental Science
    2.Chemical Biology Key Laboratory of Hebei Province
    3.Key Laboratory of Medicinal Chemistry and Molecular Diagnosis,Ministry of Education,Hebei University,Baoding 071002,China
  • Received:2022-07-15 Online:2022-11-10 Published:2022-08-21
  • Contact: GU Fang,WANG Haijun E-mail:fanggu@hbu.edu.cn;whj@hbu.edu.cn
  • Supported by:
    the Natural Science Foundation of Hebei Province, China(B2022201050);the Postgraduate Model Course of Hebei Province, China(KCJSX2021007)

Abstract:

We present a lattice gas model for the cross sections of a hydrogen bonded(HB) self-healing hydrogel, and then the Monte Carlo method is employed to simulate its self-healing behavior. The peak of the specific heat in the self-healing process is obviously observed, by which the critical association fraction of hydrogen bonds is obtained to determine whether the self-healing can take place. Furthermore, the influences of the HB strength, cooperation effect, and the separation between the cross sections on the self-healing process are investigated. Consequently, the self-healing of the HB hydrogel is identified as the first-order thermodynamic phase transition, as expected. The HB strength plays the key role not only in thermodynamics but also in dynamics of self-healing process.

Key words: Hydrogen bonded Hydrogel, Self-healing, Lattice gas model, Phase transition

CLC Number: 

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